ES8602594A1 - Procedimiento para la obtencion de dinitrotolueno - Google Patents

Procedimiento para la obtencion de dinitrotolueno

Info

Publication number
ES8602594A1
ES8602594A1 ES541319A ES541319A ES8602594A1 ES 8602594 A1 ES8602594 A1 ES 8602594A1 ES 541319 A ES541319 A ES 541319A ES 541319 A ES541319 A ES 541319A ES 8602594 A1 ES8602594 A1 ES 8602594A1
Authority
ES
Spain
Prior art keywords
mononitrotoluene
stage
nitrated
conc
toluene
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
ES541319A
Other languages
English (en)
Other versions
ES541319A0 (es
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayer AG
Original Assignee
Bayer AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bayer AG filed Critical Bayer AG
Publication of ES8602594A1 publication Critical patent/ES8602594A1/es
Publication of ES541319A0 publication Critical patent/ES541319A0/es
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C201/00—Preparation of esters of nitric or nitrous acid or of compounds containing nitro or nitroso groups bound to a carbon skeleton
    • C07C201/06—Preparation of nitro compounds
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C201/00—Preparation of esters of nitric or nitrous acid or of compounds containing nitro or nitroso groups bound to a carbon skeleton
    • C07C201/06—Preparation of nitro compounds
    • C07C201/08—Preparation of nitro compounds by substitution of hydrogen atoms by nitro groups

Abstract

PROCEDIMIENTO PARA LA OBTENCION DE DINITROTOLUENO. COMPRENDE: CONCENTRAR BAJO VACIO EL ACIDO DE SALIDA EN EVAPORADORES CALENTADOS INDIRECTAMENTE; ALIMENTAR EL MONONITROLUENO A LOS VAHOS RECALENTADOS DEL EVAPORADOR; AGREGAR MONONITROLUENO EN FORMA DE MEZCLAS CONTENIENDO MONONITROLUENO, PREFERENTEMENTE COMO PARTE DE LA FASE ORGANICA, QUE SE SEPARA DESPUES DE LA MONONITRACION DEL TOLUENO; INYECTAR AGUA O UNA PARTE DE LA FASE ACUOSA DEL CONDENSADO DE VAHOS EN LOS VAHOS RECALENTADOS; CONCENTRAR POR EVAPORACION EL ACIDO DE SALIDA, A UN CONTENIDO EN ACIDO SULFURICO DE UN 88 HASTA 94 % DE H2SO4 Y SE EMPLEA EN LA PRODUCCION DEL DINITROTOLUENO Y DESPUES EN LA DE MONONITROLUENO; EMPLEAR EL ACIDO SULFURICO AL 88 HASTA EL 94 % EN LA PRODUCCION DE DINITROTOLUENO Y DESPUES EN LA DE MONONITROLUENO; EMPLEAR EL ACIDO SULFURICO AL 88 HASTA EL 94 % EN LA PRODUCCION DE DINITROTOLUENO JUNTO CON NHO3 AL 98 HASTA 100 % Y, A CONTINUACION, EN LA PRODUCCION DEL MONONITROLUENO JUNTO CON HNO3 AL 63 HASTA 70 %.
ES541319A 1984-03-16 1985-03-15 Procedimiento para la obtencion de dinitrotolueno Granted ES541319A0 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19843409719 DE3409719A1 (de) 1984-03-16 1984-03-16 Verfahren zur herstellung von dinitrotoluol

Publications (2)

Publication Number Publication Date
ES8602594A1 true ES8602594A1 (es) 1985-12-01
ES541319A0 ES541319A0 (es) 1985-12-01

Family

ID=6230737

Family Applications (1)

Application Number Title Priority Date Filing Date
ES541319A Granted ES541319A0 (es) 1984-03-16 1985-03-15 Procedimiento para la obtencion de dinitrotolueno

Country Status (8)

Country Link
US (1) US4663490A (es)
EP (1) EP0155586B1 (es)
JP (1) JPS60204748A (es)
KR (1) KR920000372B1 (es)
BR (1) BR8501167A (es)
CA (1) CA1238652A (es)
DE (2) DE3409719A1 (es)
ES (1) ES541319A0 (es)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5057632A (en) * 1990-10-22 1991-10-15 Olin Corporation Process for preparing dinitrotoluene
DE4309140C2 (de) * 1993-03-22 2001-09-20 Bayer Ag Verfahren zur Herstellung von Dinitrotoluol
DE4428462A1 (de) * 1994-08-11 1996-02-15 Bayer Ag Verfahren zur Herstellung von Dinitrotoluol
DE4428459A1 (de) * 1994-08-11 1996-02-15 Bayer Ag Verfahren zur Herstellung von Dinitrotoluol
DE4428461A1 (de) * 1994-08-11 1996-02-15 Bayer Ag Verfahren zur Herstellung von Dinitrotoluol
DE19512114C2 (de) * 1995-04-04 2000-04-27 Meissner Gmbh & Co Kg Josef Rückgewinnung von Salpetersäure aus Nitrierprozessen
CA2254612A1 (en) * 1996-09-06 2000-05-27 Bayer Aktiengesellschaft A process for purifying and concentrating spent sulphuric acids
DE19745119A1 (de) 1997-10-13 1999-04-15 Bayer Ag Verfahren zur Herstellung von Dinitrotoluol in adiabatischer Fahrweise
DE10143800C1 (de) * 2001-09-06 2002-08-22 Plinke Gmbh Verfahren zur Minimierung des Abwassers bei der Herstellung von DNT
DE10231314B4 (de) * 2002-07-10 2008-07-31 Plinke Gmbh Verfahren zum Einsatz von Edelstahlkondensatoren bei Anlagen zur Strippung von Nitrierabfallsäuren
AU2003293880A1 (en) * 2002-12-16 2004-07-09 Behr Gmbh And Co. Kg Refrigerant circuit and a refrigerating system
DE102004005913A1 (de) * 2004-02-05 2005-08-25 Basf Ag Verfahren zur Herstellung von Dinitrotoluol
DE102005050106B4 (de) 2005-10-18 2008-04-30 Josef Meissner Gmbh & Co. Kg Rückgewinnung von Nitriersäuregemischen aus Nitrienprozessen
EP1876142B1 (de) 2006-06-21 2008-09-17 QVF Engineering GmbH Verfahren und Anlage zur Konzentrierung von Abfall-Schwefelsäuren aus Nitrierprozessen
DE102006033722A1 (de) * 2006-07-21 2008-01-24 Bayer Materialscience Ag Verfahren zur Herstellung von Dinitrotoluol
DE102006060572A1 (de) * 2006-12-19 2008-06-26 Bayer Materialscience Ag Verfahren zur Herstellung von Toluylendiaminen durch katalytische Hydrierung von Dinitrotoluolen
DE102007034875B3 (de) * 2007-07-24 2008-10-16 Plinke Gmbh Brüdenkondensator
DE102007059513A1 (de) * 2007-12-11 2009-06-18 Bayer Materialscience Ag Verfahren zur Herstellung von Nitrobenzol durch adiabate Nitrierung
EP2295375B1 (de) 2009-09-15 2016-04-13 De Dietrich Process Systems GmbH Verfahren und anlage zur aufarbeitung von abfall-schwefelsäuren aus nitrierprozessen
DE102013021026B4 (de) 2013-12-19 2022-07-21 Plinke Gmbh Verfahren und Anlage zur Reinigung und Konzentrierung von Abfallsäure aus Nitrierprozessen
HUE050513T2 (hu) * 2014-10-02 2020-12-28 Covestro Intellectual Property Gmbh & Co Kg Véggáz tisztítása dinitrotoluol folyamatos gyártására szolgáló eljárásnál
CN104529785A (zh) * 2014-12-25 2015-04-22 甘肃银光化学工业集团有限公司 一种混酸硝化法制备2,4-二硝基甲苯的方法
CN109467508B (zh) * 2018-11-22 2021-08-10 四川金象赛瑞化工股份有限公司 一种微通道反应器合成二硝基甲苯的方法
CN113371906A (zh) * 2021-05-31 2021-09-10 湖北东方化工有限公司 一种二硝基甲苯回收装置及工艺

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2256999A (en) * 1939-03-08 1941-09-23 Du Pont Nitration of organic compounds
US3178481A (en) * 1963-01-07 1965-04-13 Atlas Chem Ind Dinitrotoluene manufacture
US4091042A (en) * 1977-08-19 1978-05-23 American Cyanamid Company Continuous adiabatic process for the mononitration of benzene
DE2909029C2 (de) * 1979-03-08 1990-05-31 Schott Glaswerke, 6500 Mainz Verfahren zum Konzentrieren und Reinigen von Schwefelsäure
EP0022181B1 (de) * 1979-06-13 1983-10-12 Bayer Ag Verfahren und Vorrichtung zum Regenerieren von Schwefelsäure
EP0021210B1 (de) * 1979-06-13 1983-07-13 Bayer Ag Verdampfer zum Konzentrieren von Mineralsäure, insbesondere Schwefelsäure
US4367347A (en) * 1981-06-01 1983-01-04 Air Products And Chemicals, Inc. High purity 2,4-dinitrotoluene from toluene nitration process
US4496782A (en) * 1983-07-08 1985-01-29 Air Products And Chemicals, Inc. Nitric acid recovery by the adiabatic nitration of nitroaromatics with fortified spent acid
US4600702A (en) * 1984-11-14 1986-07-15 Monsanto Company Vapor phase nitration catalysts

Also Published As

Publication number Publication date
DE3560827D1 (en) 1987-12-03
US4663490A (en) 1987-05-05
JPS60204748A (ja) 1985-10-16
EP0155586A1 (de) 1985-09-25
KR850006923A (ko) 1985-10-25
EP0155586B1 (de) 1987-10-28
BR8501167A (pt) 1985-11-12
CA1238652A (en) 1988-06-28
KR920000372B1 (ko) 1992-01-13
ES541319A0 (es) 1985-12-01
DE3409719A1 (de) 1985-09-19
JPH0137389B2 (es) 1989-08-07

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 20050920